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"Nov. 2,1926. I 1,605,899-

K. L. MOSES LAMINATED SHEET MATERIAL Filed Jan. 8. 1926 lnvenTor. Kirke L. Moses by ATTys.

Patented Nov. 2, 1926.

ITE' STAT S KIRKE L. vrosns, or BROOKLINE, MASSACHUSETTS.

j LAMINATED SHEET MATERIAL.

Application filed January 8, 1926. Serial No. 79,979.

This invention relates to laminated sheet material in which one of the plies is formed of an absorbent paper base saturated or impregnated with various liquids, such as liquids containing rubber and water (which embrace among others natural rubber, balata or gutta-percha containing latices preserved with ammonia or dispersions, suspensions or emulsions of rubber involving water); gelatine and glycerine containing liquids; glue and glycerine containing liquids; and drying oil containing emulsions. The saturating liquids containing or involving rubber or the like may also contain a filling ingredient and/or compounding ingredients necessary to vulcanization of the final product.

One of the objects of the invention is to provide a laminated sheet embodying such a paper base as one of its plies, which laminated sheet will have high tear-resisting qualities and will also have superior stitchholding qualities. I

This end is accomplished by uniting with the paper ply another ply formed of unspun fibres which is impregnated with rubbercontaining liquid. The presence of the ply of unspun fibres gives to the laminated sheet high tear-resisting qualities and also those qualities which hold stitches in a superior manner. The impregnated paper ply forms a surface which is well adapted for treatment with coating material to produce an artificial leather and can be used wherever it is desired to employ artificial leather.

through a bath containing the impregnating I material and simultaneously pass through said bath a web of unspun fibre, the two webs being superposed as they are carried through the bath and also being subjected to pressure while in the bath to press them together. In this way the two webs are simultaneously impregnated and united, and

l which is taken from a roll 5. 6 indicates a web of unspun fibre, such for instance as batting or felt, which is taken from a roll 7. These two webs are shown as being taken simultaneously from the rolls 5 and 7 and passed over a guide roll 8 and thence into and through the bath 2, said webs both pass ing between the squeeze rolls 3. As the two websemerge from the bath they pass between other squeeze rolls 9. The action of the squeeze rolls 3 will be to force air out of the two webs thus allowing a thorough impregnation of the webs by the liquid before the webs are withdrawn from the bath. The squeeze rolls 3 also operate to press the two webs together and this uniting of the webs is augmented by the action of the squeeze rolls 9 which also operate to remove surplus liquid from the combined webs. After the laminated web has been thus formed it may be dried in any well known way, and subsequently vulcanized, calendered or otherwise treated depending on the use to which it is to be put.

Where the liquid 2 is in the nature of a liquid containing rubber, such for instance as latex or a dispersion or suspensoid of rubber involving water, the impregnation of the webs results in giving added strength to each web by reason of the fact that after the laminated sheet is dried the fibres in the webs will be adhesively united by the rubber that was contained in the impregnating liquid, and the pressing of the two webs together by the action of the two rolls 3 and 9 assists in uniting the two plies or webs, so

that when they are dried a firm bond exists between them. The paper web or ply 4 presents an excellent surface for treatment to produce an artificial leather finish. The web 6 of unspun fibres when impregnated with the rubber-containing liquid forms a ply having high tear-resisting qualities and because of the presence of the fibres therein it will hold stitches in a superior manner thus making a laminated sheet which can be plosition without danger i cut through the mate- I departing from the invention. If it is desired to produce a laminated sheet in which both sides are adapted to have an artificial leather finish applied thereto, or for any other reason, then the laminated sheet might be made of three plies or laminations, two of the impregnated paper and an intermediate ply of the rubber-united unspun fibres.

I claim:

1. A laminated sheet comprising rubberunited plies, part of the plies of which are of paper and part of unspun fibre, and throughout all the plies of which therejs is; substantially uniform distribution of rub- 2. A laminated sheet comprising rubberunited plies, art of the plies of which are of paper an art of unspun fibre, and throughout all t e plies of which there is a substantially uniform distribution of the solid constituents of latex.

3. A laminated sheet comprising rubberunited plies, part of the plies of which are of paper and part of unspun fibre, and throughout all the plies of which there is a substantially uniform distribution of Vulcanized rubber.

In testimony whereof, I have signed my name to thisspecification.

KIRKE L. MOSES. 

